`rust-src` component not found.

[ntduan]

When I execute cargo +nightly Contract build, I got an error.

 `rust-src` component not found. Run `rustup component add rust-src`.

But I think I have rust-src installed, and the rustup component list | grep rust-src also shows that I have rust-src installed.

I tried to specify rust-src manually through export XARGO_RUST_SRC=/home/nzzt/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library, and I succeeded in the next step, but unfortunately another error occurred.

I checked the directory on my computer and found that it didn't match the actual directory.

[ascjones]

It does look like nightly is your default toolchain, but anyway double check that it is installed with rustup component list --toolchain nightly | grep rust-src. If it's not you can do rustup component add rust-src --toolchain nightly

[ntduan]

@ascjones
➜ flipper rustup component list --toolchain nightly | grep rust-src
rust-src (installed)

=========================
I compared the code with someone else who could build normally, and I found an interesting problem. His rust-src directory is .rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src, but my rust-src directory is .rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library.

This looks like a version upgrade issue. I'm not very familiar with Rust, I'm not sure.

[ascjones]

Yeah mine is also rust/src, which is what I would expect it to be. Could try reinstalling everything, or perhaps do rustup update --toolchain nightly && rustup component add rust-src --toolchain nightly

[ntduan]

@ascjones
In fact, not only have I reinstalled it, I've also tried it on a newly installed server. I've tried it on three computers. I get the same error.

[ntduan]

Perhaps it is because of a recent change in the structure of rust's source code. Just a few days ago.

[ntduan]

After I installed the old version nightly, The problem was solved. When installing rust-src, It also need to specify the version. like rustup component add rust-src --toolchain nightly-2020-07-11

[ascjones]

Ah yes: rust-osdev/cargo-xbuild#88, rust-osdev/cargo-xbuild#87

[ascjones]

See #71, I won't merge this yet but you can install from the PR branch if you want to use it in the meantime.

[MaciejBaj]

@aniiantt Bumping cargo-xbuild to 0.6.0 works

[Valentine-Mario]

Upgrading cargo-xbuild didn't seem to work for me.